(E)-4-[1-(tert-Butyl-dimethyl-silanyloxy)-4-hydroxy-3-(1-hydroxy-2-methyl-propyl)-5-methoxy-naphthalen-2-yl]-but-2-enoic acid methyl ester 在
ammonium cerium(IV) nitrate 、
sodium methylate 作用下,
生成 ((1S,3S)-1-Isopropyl-9-methoxy-5,10-dioxo-3,4,5,10-tetrahydro-1H-benzo[g]isochromen-3-yl)-acetic acid methyl ester